Integral upper limit function is a basic concept in function differential calculus.
积分上限函数是一元函数微分学的基本概念。
The integral upper limit function strengthened between the differential and the integral relation, is the definite integral fundamental formula rationale.
积分上限函数加强了微分和积分之间的联系，是定积分基本公式的理论基础。
Integral that upper limit of integral is variable is a important theory, results of operation is function forma after all. Research this kind of function, get a few theorem.
变上限积分是积分学的一个重要理论，其运算结果仍以函数的形式体现。研究这类函数，得出几个颇有理论意义的定理。
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